GM Service Manual Online
For 1990-2009 cars only

The audible warnings alert the driver of a system concern or a critical vehicle condition. The body control module (BCM) generates the audible warnings. The following lists the audible warning priority and the pulse rate:

  1. Fast rate chime--200 pulses per minute
  2. Medium rate chime--150 pulses per minute
  3. Slow rate chime--50 pulses per minute
  4. Single chime

Fasten Safety Belt Warning

The BCM activates the fasten safety belt audible warning for 5-8 seconds. The fasten safety belt warning sounds and the fasten seat belt indicator illuminates when the following occurs:

    • The ignition switch is in RUN, BULB TEST, or START position.
    • The BCM detects that the driver's seat belt is not buckled/signal is low.

If the seat belt is buckled before the ignition is in RUN, BULB TEST, or START position, the chime does not sound. If the seat belt is buckled while the chime is sounding, the chime stops.

Key-In-Ignition Warning

The BCM activates the key-in-ignition audible warning. The key-in-ignition warning sounds when the following occurs:

    • The ignition switch is in OFF, LOCK, or ACCY position.
    • The body control module (BCM) determines that the driver's door is open/signal is low.
    • The BCM determines that the ignition key alarm switch is closed/signal is low.

Lights On Warning

The BCM activates the lights on audible warning. The lights on warning sounds when the following occurs:

    • The key is not in the ignition.
    • The BCM determines that the driver's door is open/signal is low.
    • The BCM determines that the headlamp switch is in the park or head position.